I wouldn't try mixing things like that.
OBIEE is 12.2.x, and use Weblogic 12.2.x. The certification matrix doesn't tell anything (as far as I remember) about a possible compatibility with a lower version, but I would say it's a "no". Even if it works you will have no support at all as it's not certified.
OBIEE come with it's own weblogic as it's strictly related to the FMW version, so you probably have to stay with the corresponding version of weblogic coming with your chosen version of OBIEE.
Please use the following link and see the certifications tab -